Use want helpers for callers_test (#32)

callers_test.go

@@ -2,8 +2,9 @@ package faket
 
 import (
 	"path/filepath"
-	"strings"
 	"testing"
+
+	"github.com/prashantv/faket/internal/want"
 )
 
 func TestGetCallers(t *testing.T) {
@@ -28,25 +29,17 @@ func TestGetCallers(t *testing.T) {
 func TestGetCaller(t *testing.T) {
 	t.Run("skip all", func(t *testing.T) {
 		pc := getCaller(1000)
-		if pc != 0 {
-			t.Fatalf("expected empty pc, got %v", pc)
-		}
+		want.Equal(t, "pc", pc, 0)
 	})
 
 	t.Run("skip 0", func(t *testing.T) {
-		s := pcToFunction(getCallerCaller(0))
-		want := "faket.getCallerCaller"
-		if got := filepath.Base(s); got != want {
-			t.Fatalf("with no skip, got %v, want %v", got, want)
-		}
+		got := pcToFunction(getCallerCaller(0))
+		want.Equal(t, "caller function", filepath.Base(got), "faket.getCallerCaller")
 	})
 
 	t.Run("skip 1", func(t *testing.T) {
 		got := pcToFunction(getCallerCaller(1))
-		want := "TestGetCaller"
-		if !strings.Contains(got, want) {
-			t.Fatalf("with skip, got %v, want contains %v", got, want)
-		}
+		want.Contains(t, "caller function", got, "TestGetCaller")
 	})
 }